OK. I'm only posting this because I had a REALLY staunch grammar teacher at one point, & this is one of those "etched/branded" lessons I never forgot:

What also sounds weird is that "candelabrum" is technically the "proper" singular form & "candelabra" the plural. She had a BIG problem with the "accepted conversational" forms of "candelabra" & "candelabras" (along with a LOT of other things).